Is there CAN interface in ESP32?

htjgdw
Posts: 1
Joined: Tue Dec 22, 2015 5:47 pm

Is there CAN interface in ESP32?

Postby htjgdw » Thu Feb 18, 2016 1:08 am

Hi,
I notice CAN interface in ESP32 diagram, but don't find description of it in datasheet.
Is there CAN interface in ESP32?

Espressif_Kelly
Posts: 8
Joined: Tue Nov 24, 2015 2:19 am

Re: Is there CAN interface in ESP32?

Postby Espressif_Kelly » Tue Feb 23, 2016 7:20 am

Hi,

We recommend you to use SPI interface of ESP32 to connect external chip with CAN controller and CAN driver integrated. Because current beta version ESP31 has no CAN controller internally and only ESP32 does have CAN controller.

BTW, besides SPI interface of ESP31/ESP32 can be used to connect spi flash, HSPI and VSPI are also available for customers to connect various peripherals.

More questions, please feel free to let us know.

Thanks.

dpharris
Posts: 8
Joined: Fri Feb 12, 2016 1:36 am

Re: Is there CAN interface in ESP32?

Postby dpharris » Wed Mar 02, 2016 6:36 pm

Thanks Kelly.

That is disappointing, external CAN controller have limited throughput and are not ideal.

Some of your block diagrams show a CAN peripheral. Is this in error, planned for a future chip, or present, but not brought out to pins?

Thanks again,
David

User avatar
rudi ;-)
Posts: 1727
Joined: Fri Nov 13, 2015 3:25 pm

Re: Is there CAN interface in ESP32?

Postby rudi ;-) » Thu Mar 03, 2016 10:42 am

dpharris wrote: ..Some of your block diagrams show a CAN peripheral. Is this in error, planned for a future chip, or present, but not brought out to pins?
hi david,
think there is a missunderstand, ..please read detailed..
Espressif_Kelly wrote: ..Because current beta version ESP31 has no CAN controller internally and only ESP32 does have CAN controller.
only the beta version ESP31 has no CAN controller just in time...
and to your question: Is there CAN interface in ESP32?
there is the answere: Yes , like Kelly said.

hope this helps

best wishes
rudi ;-)
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love it, change it or leave it.
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dpharris
Posts: 8
Joined: Fri Feb 12, 2016 1:36 am

Re: Is there CAN interface in ESP32?

Postby dpharris » Mon Mar 21, 2016 11:51 pm

Thanks:
* ESP31 is prelim chip (beta) without CAN;
* ESP32 will be out by mid 2016, and will include CAN.

Great news, can't wait.

David

AndyFahey
Posts: 1
Joined: Wed May 04, 2016 5:46 pm

Re: Is there CAN interface in ESP32?

Postby AndyFahey » Wed May 04, 2016 6:10 pm

As per my knowledge you should use SPI interface of ESP32 to connect external chip with CAN controller and CAN driver integrated. Because current beta version ESP31 has no CAN controller internally and only ESP32 does have CAN controller.
BTW, besides SPI interface of ESP31/ESP32 can be used to connect spi flash, HSPI and VSPI are also available.

printed circuit assembly

markwj
Posts: 90
Joined: Tue Mar 08, 2016 5:03 am

Re: Is there CAN interface in ESP32?

Postby markwj » Sat Sep 03, 2016 9:56 am

Now this has been released, can we have some details on the CAN? Which pins are used to connect to the external transciever? Presumably just CANTX and CANRX? Any documentation on the software for this (or pointers to CPU documentation)?

kmakhil90
Posts: 7
Joined: Tue Sep 06, 2016 8:14 am

Re: Is there CAN interface in ESP32?

Postby kmakhil90 » Mon Sep 19, 2016 6:01 am

Hi,

Need details on CAN 2.0 in ESP32.
Please help.

modtronix
Posts: 8
Joined: Wed Sep 21, 2016 3:57 am

Re: Is there CAN interface in ESP32?

Postby modtronix » Thu Oct 27, 2016 1:41 am

Hi, I still can not find any details regarding CAN 2.0 in the ESP32 Datasheet. Is there any information available about the CAN 2.0 interface for the ESP32?

ESP_Sprite
Posts: 9709
Joined: Thu Nov 26, 2015 4:08 am

Re: Is there CAN interface in ESP32?

Postby ESP_Sprite » Thu Oct 27, 2016 8:58 am

No, sorry. I'm trying to speed up the documentation somewhat, but the teams here are somewhat overloaded... I'll see if I can poke the relevant people again.

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